ECM
Tech Tips
The standard voltage and resistance of each pair of ECM terminals is shown in the table below.
The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage or resistance for that pair of terminals shown in the "Specified Condition" column.
Use the illustration above as a reference for the ECM terminals.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A53-1 (BATT) - D1-59 (E1) | R - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A53-2 (+B) - D1-59 (E1) | W - BR | Power source of ECM | Engine switch on (IG) | 11 to 14 V |
| A53-3 (+B2) - D1-59 (E1) | B - BR | Power source of ECM | Engine switch on (IG) | 11 to 14 V |
| A53-13 (CANH) - D1-59 (E1) | B - BR | CAN communication line | Engine switch on (IG) | Pulse generation |
| A53-23 (NSW) - D1-59 (E1) | W - BR | Park/neutral position switch signal | Engine switch on (IG) and shift lever in P or N | Below 1 V |
| Engine switch on (IG) and shift lever not in P or N | 11 to 14 V | |||
| A53-26 (CANL) - D1-59 (E1) | W - BR | CAN communication line | Engine switch on (IG) | Pulse generation |
| A53-42 (SFTU) - D1-59 (E1) | P - BR | Up-shift position switch signal | Engine switch on (IG) and shift lever in M | 11 to 14 V |
| Engine switch on (IG) and shift lever held in "+" | Below 1 V | |||
| A53-43 (SFTD) - D1-59 (E1) | GR - BR | Down-shift position switch signal | Engine switch on (IG) and shift lever in M | 11 to 14 V |
| Engine switch on (IG) and shift lever held in "-" | Below 1 V | |||
| A53-46 (MREL) - D1-59 (E1) | Y - BR | EFI MAIN relay | Engine switch on (IG) | 11 to 14 V |
| A53-59 (S) - D1-59 (E1) | BR - BR | M position switch signal | Engine switch on (IG) and shift lever in M | 11 to 14 V |
| Engine switch on (IG) and shift lever not in M | Below 1 V | |||
| D1-9 (SLP+) - D1-8 (SLP-) | W - Y | Shift solenoid valve SLP signal | Engine idling | Pulse generation |
| D1-13 (SLU+) - D1-12 (SLU-) | R - W | Shift solenoid valve SLU signal | Lock-up turned from OFF to ON | Pulse generation |
| D1-15 (SLS+) - D1-14 (SLS-) | BR - Y | Shift solenoid valve SLS signal | Engine idling | Pulse generation |
| D1-29 (+BM) - D1-59 (E1) | L - BR | Power source of ECM | Always | 11 to 14 V |
| D1-38 (SC) - D1-59 (E1) | P - BR | Shift solenoid valve SC signal |
|
Pulse generation |
| D1-39 (N) - D1-59 (E1) | SB - BR | N position switch signal | Engine switch on (IG) and shift lever in N | 11 to 14 V |
| Engine switch on (IG) and shift lever not in N | Below 1 V | |||
| D1-40 (SL) - D1-59 (E1) | L - BR | Shift solenoid valve SL signal | Lock-up operating | Pulse generation |
| D1-59 (E1) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω |
| D1-65 (R) - D1-59 (E1) | R - BR | R position switch signal | Engine switch on (IG) and shift lever in R | 11 to 14 V |
| Engine switch on (IG) and shift lever not in R | Below 1 V | |||
| D1-66 (D) - D1-59 (E1) | W - BR | D position switch signal | Engine switch on (IG) and shift lever in D | 11 to 14 V |
| Engine switch on (IG) and shift lever not in D | Below 1 V | |||
| D1-70 (P) - D1-59 (E1) | G - BR | P position switch signal | Engine switch on (IG) and shift lever in P | 11 to 14 V |
| Engine switch on (IG) and shift lever not in P | Below 1 V | |||
| D1-74 (NOTO) - D1-59 (E1) | B - BR | Transmission revolution sensor (NOUT) signal | When driving with shift lever in D | Pulse generation |
| D1-75 (NOTB) - D1-59 (E1) | W - BR | Power supply for transmission revolution sensor (NOUT) | Engine switch on (IG) | 4.75 to 5.25 V |
| D1-79 (PTO) - D1-109 (EPTO) | L - LG | Oil pressure sensor signal | Engine idling with shift lever in P | 0.8 to 1.2 V |
| D1-110 (VCPT) - D1-109 (EPTO) | W - LG | Power supply for oil pressure sensor | Engine switch on (IG) | 4.5 to 5.5 V |
| D1-123 (NIN+) - D1-124 (NIN-) | G - R | Transmission revolution sensor (NIN) signal | When driving with shift lever in D | Pulse generation |
| D1-125 (NTO) - D1-59 (E1) | V - BR | Transmission revolution sensor (NT) signal | When driving with shift lever in D | Pulse generation |
| D1-126 (NTB) - D1-59 (E1) | P - BR | Power supply for transmission revolution sensor (NT) | Engine switch on (IG) | 4.75 to 5.25 V |
| D1-127 (THO1) - D1-128 (ETHO) | G - BR | CVT fluid temperature sensor signal | CVT fluid temperature: 60 to 120°C (140 to 248°F) | 0.2 to 1.0 V |